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p21 Waf1/Cip1 (12D1) Rabbit mAb (SignalFlex mFluor Red 780 Conjugate) #82422

    Supporting Data

    REACTIVITY H Mk
    SENSITIVITY Endogenous
    MW (kDa)
    Source/Isotype Rabbit IgG
    Species Cross-Reactivity Key:
    • H-Human 
    • Mk-Monkey 

    Product Information

    Product Description

    This Cell Signaling Technology® antibody is conjugated to mFluor™ Red 780 fluorescent dye under optimal conditions and formulated at 200 µg/mL. This antibody conjugate is expected to exhibit the same species cross-reactivity as the unconjugated #2947

    Fluorescent Properties

    • ← Excitation: 629 nm ← Emission: 767 nm

    Product Usage Information

    SignalFlex™ conjugates are produced using highly validated Cell Signaling Technology® primary antibodies and conjugation methods that have been rigorously tested, ensuring high-quality conjugates and lot-to-lot consistency. These conjugates are quality control tested by size exclusion chromatography (SEC) to determine antibody integrity. However, they are not tested on specific assays.

    Optimal dilutions/concentrations should be determined by the end user. When performing flow cytometry, we recommend using an isotype control conjugate at the same concentration as the antibody conjugate.

    Storage

    Supplied in PBS (pH 7.2), less than 0.1% sodium azide, and 2 mg/mL BSA. Store at 4°C. Do not aliquot the antibody. Protect from light. Do not freeze.

    Specificity / Sensitivity

    p21 Waf1/Cip1 (12D1) Rabbit mAb (SignalFlex™ mFluor™ Red 780 Conjugate) detects endogenous levels of total p21 protein. The antibody does not cross-react with other CDK inhibitors. Non-specific cytoplasmic staining was observed in normal small intestine epithelium, alveolar macrophages, and kidney proximal tubules by immunohistochemistry.

    Species Reactivity:

    Human, Monkey

    The antigen sequence used to produce this antibody shares 100% sequence homology with the species listed here, but reactivity has not been tested or confirmed to work by CST. Use of this product with these species is not covered under our Product Performance Guarantee.

    Species predicted to react based on 100% sequence homology:

    Dog

    Source / Purification

    Monoclonal antibody is produced by immunizing animals with a synthetic peptide corresponding to residues near the carboxy-terminus of human p21.

    Background

    The tumor suppressor protein p21 Waf1/Cip1 acts as an inhibitor of cell cycle progression. It functions in stoichiometric relationships forming heterotrimeric complexes with cyclins and cyclin-dependent kinases. In association with CDK2 complexes, it serves to inhibit kinase activity and block progression through G1/S (1). However, p21 may also enhance assembly and activity in complexes of CDK4 or CDK6 and cyclin D (2). The carboxy-terminal region of p21 is sufficient to bind and inhibit PCNA, a subunit of DNA polymerase, and may coordinate DNA replication with cell cycle progression (3). Upon UV damage or during cell cycle stages when cdc2/cyclin B or CDK2/cyclin A are active, p53 is phosphorylated and upregulates p21 transcription via a p53-responsive element (4). Protein levels of p21 are downregulated through ubiquitination and proteasomal degradation (5).
    For Research Use Only. Not for Use in Diagnostic Procedures.
    Cell Signaling Technology is a trademark of Cell Signaling Technology, Inc.
    mFluor is a trademark of AAT Bioquest, Inc.
    SignalFlex is a trademark of Cell Signaling Technology, Inc.
    mFluor is manufactured by AAT Bioquest, Inc.
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